JP5299234B2 - Jacquard yarn guide rod for warp knitting textile machinery - Google Patents

Abstract

A jacquard thread-guide bar (2) for warp knitting textile machines, comprising a supporting body (7) provided with a plurality of housing seats (5) configured and arranged so as to engage each removably a mounting body (6) of a single piezoelectric actuator (3) and to carry out an individual removable mounting of the single piezoelectric actuator (3) onto said supporting body (7), the housing seats (5) extending perpendicularly to the main longitudinal extension of the bar (2) and being configured and arranged so as to guide the sliding of the mounting body (6) between a mounting position and a disengaged position.

Description

  The present invention relates to warp-knitting textile machines, specifically warp-knitting machines such as warp machines, russell machines, tricot machines, cloche machines, and similar knitting machine jails. The present invention relates to a card yarn-guide bar. The present invention further relates to a warp knitting machine comprising the aforementioned guide rod.

  As is known, a linear warp knitting machine is provided with a plurality of bars designed to carry a plurality of yarn holding elements commonly known as yarn guides. Such a bar is moved so that the yarn associated with the yarn guide can be accurately fed onto the needles of the needle bed of the knitting machine to form a new fabric. The thread guide bar is known as two basic movements, namely a linear motion before or after each needle hook, commonly known as “shog”, and generally as “swing”. Oscillating movement on the side surface of each needle to carry the thread alternately before and after the needle hook. In addition, thread guide bars are known for jacquard thread guide bars, in which each thread guide in an additional needle space is connected to the bar according to the specified pattern to be obtained in the fabric. A jacquard device is provided that can be moved individually in the same direction or in the opposite direction to the shog movement. For this purpose, two selection types are still basically used today, one is to use piezoelectric elements or piezoceramic elements and the other is to move the thread guide from one position to the other. Using a pull-and-push system as a mechanical element that can be shifted to In the former case, the shift is performed by the deflection or bending of the seat, the seat is firmly fixed at its upper part and can move freely during its control at its lower part. The downward movement takes place between two mechanical stops whose space is strictly defined according to the mechanical compatibility. There is a hole at the tip or end of the bent sheet through which the yarn is guided. By shifting the lower end of the sheet, that is, the thread guide, the thread therein is also shifted and interacts with the underlying needle.

  The selective shift of the thread guide bar is such that the thread is individually shifted between two adjacent needles, so that during weaving, the thread for the needle is on the adjacent needle, ie the original of the needle. It can be selectively shifted forward or backward of the needle shed with respect to the position. The additional shift always consists of one needle in the jacquard machine. Japanese Patent No. 6,309,762, filed September 30, 1986, introduces the use of piezoelectric elements associated with individual yarn guides to form jacquard fabrics on a warp knitting machine. According to this patent, the piezoelectric element shifts at any time, therefore when the thread guide is in front of the needle hook (movement called “overlap”) and the thread guide is behind the needle hook ( Compared to conventional mechanical systems when the thread guide shifts horizontally in both directions, either during movement (called "underlap") or by shifting the bar (horizontal movement or shog of the bar) It can be done at a higher speed.

  In that case, new systems of electronic integrated circuits for transmitting selective electrical signals to various terminals or pins connected to the piezoelectric sheet of Jacquard actuators, of new materials such as electrical cables, electronic circuits and pilot fields Along with the development of technology, other solutions have been developed that actually use new inventions offered throughout the electronics industry. As far as the number of circuits, i.e. cables, is concerned, use the technology of data conversion from serial to parallel, in particular, to select the current and voltage required for shifting or bending the piezoelectric yarn holding sheet to individual pins A significant improvement was obtained by sending the data. Commands are no longer transmitted by multiple lines connected to a single pin (for example, German Patent No. 4226899, Aug. 14, 1992), but using a bus, the data depends on the integrated circuit used. "Move" on a slight line to process several sheets or groups of sheets. For example, a technology known as SPI (Serial Parallel Interface) is today standard in this respect. This system refers to a serial / parallel conversion interface for signals (present on the transmission bus and used to control piezoelectric sheets in the jacquard system). This interface has long been known and standardized (actually dates back to the early 80's). There are many other bus-based data transmission systems, such as SPI, that are improved and secure compared to the old SPI, but basically their functions are the same, ie weak signals are on the bus. If present, a power supply / card is embedded that provides the energy necessary for proper operation of the actuator as programmed. Typically, in an electronic circuit, the number is expressed in hexadecimal, and the optimal solution is to distribute the commands to groups of 16 threads. Again, using this electronic singularity, a jacquard actuator selector using a module composed of 16 actuators was developed. An example of such a system is disclosed in US Pat. No. 5,533,366. The modules physically carry 16 actuators that are securely fastened to each module, which are then mounted on jacquard bars. The actuator is not physically connected to the module, i.e. not entirely glued to the module, but is firmly connected by welding to the various wires connecting to the pins of the actuator and welded to the various pins. From the actuator holding module, collected and guided through the structure (extruded cable made of ordinary rubber or heat-shrinkable rubber or tubular knitted sheath) and collected in the external cable or sheath All wires will be routed to a connector (typically a male connector) that will fit into a female connector that is part of the interface for transmitting the power signal to a single pin of the electrical actuator. Such an interface connects the actuator holding module to the power supply side, which supplies current and voltage and generates a knitted structure, and thus a microprocessor-based corresponding to the command sent by the shift of the piezoelectric sheet Controlled by control system. This is a structure composed of a module in which a piezoelectric sheet is firmly incorporated by bonding a pin of a single piezoelectric sheet firmly to the pin, for example by adhering to a wire welded to the pin with an appropriate resin. It is. This area, in turn, is coated with resin and becomes a single wire cable consisting of a sheet pin and a sheet in the weld area, so that the vibration experienced by the piezoelectric module during operation damages the piezoelectric sheet so that it cannot be recovered. Avoid causing total or partial separation of the welded piezoelectric sheet from the pins that would result in a failed reject. In the case of a problem with a given damaged piezoelectric sheet that is part of a given group or module, this solution allows the module to be replaced relatively quickly with a functional spare module. However, this system has several important drawbacks, as will be described later. First, in the presence of a single failed piezoelectric actuator, the entire group (generally composed of 16 actuators) should be replaced, so that is clearly a spare with the same mechanical compatibility. It means having a group of goods. Spare stock can contain many modules. This is because machines (eg, machines that are 3.5 meters in length) are equipped with many of these modules (ie, about 400). Furthermore, the modules are very expensive, thus greatly increasing the cost of replacing a single actuator. Furthermore, considering the inventory of a reasonable number of modules (at least 10), the total cost is very high. Thus, in the case of a failed piezoelectric actuator, the entire module with 16 actuators (15 of which operate correctly) and also with connecting cables and connectors needs to be replaced.

  Another disadvantage is that module replacement requires time, i.e. downtime, no production, and some defective fabric produced. This is because the module carrying the piezoelectric sheet is fitted or fastened adjacent to one bar. By removing the module, a void is created and a new module is inserted into it. However, although the modules are well made, not all are the same due to manufacturing tolerances and are not completely compatible. For example, in a rod carrying 100 modules, a single module is made with a width slightly smaller than the theoretical value so that the first and last thread guides are perfectly aligned with the first and last needles, This makes it possible to introduce a new module between two adjacent modules under any circumstances. The manufacturing tolerances of a single module are fairly accurate, but even a few hundredths of a millimeter can end up with a high variance, for example, a tolerance of 0.02 mm per module x 50 modules = 1 mm. In other words, the last yarn guide sheet is displaced by 1 mm from the needle. Considering a machine with a fineness of 24, ie a machine with 24 needles per inch (equivalent to 25.4 mm), the shed between one needle and the other is 25.4: 24 = 1.5883 mm In other words, with the 1 mm shift, the last thread guide may be aligned or matched to the previous needle, not its own needle. Therefore, the single modules need to be put in place one by one so that the thread guides are perfectly aligned with their needles. This is a typical manual operation performed by specialized personnel by first comparing the position of a single sheet on the workbench with the position of the sample needle bed, ie, the appropriate mounting calibration device. If the module is not OK, the module body is modified laterally with slight adjustments, including metal removal, and thus with size variations, so that the position is satisfied. Thus, removing the material on the right or left side of the module increases the theoretical space between the two modules. Thus, inevitably, the modules do not contact but create a gap after installation, which remains and makes it more difficult to replace a failed module with a functioning module. Therefore, the replacement of the module is very important because there is no visible place between the piezoelectric sheet and the needle when replacing the module. The modules need to be installed and then adjusted, changed and aligned so that the modules meet the conditions of use. If the module is not OK, the module needs to be removed and modified by removing the left or right material, and if the module is not properly aligned, or the space left by the module once removed If it is too large, and therefore there is a large gap of about 0.15 to 0.30 mm, the maintenance staff will adjust the module using simple means, such as a screwdriver, and lift the module nearby with a lever. You need to find a solution to place the module in the correct position by roughly shifting the module by and then fastening the module in the correct position, but these are checked during weaving anyway There is a need. This operation is complex and may require several trials and needs to be done accurately so as not to impair the function of the machine and the quality of the manufactured product. More simply, it should be noted that during the exchange, the 16 yarns of the machine need to be pulled out and, finally, the 16 yarns also need to be re-threaded in a rather troublesome position. Thus, besides the cost of the module to be replaced, the replacement operation is complex and requires specialized personnel. Lastly, the known technology is very time consuming to replace each actuator (the machine can fail for a long time if there is no specialist engineer when the failure occurs) and the production level As far as is concerned, it can be an important drawback. Furthermore, the modules cannot be repaired by the weaving company and in principle the modules are sent to the manufacturer, where they are often not repaired. In practice, repair involves removing and replacing a single piezoelectric sheet, but as described above, a single piezoelectric sheet is resin or bonded together with all other module parts, wire connections, other sheets, etc. Sealed with an agent. The removal of the resin takes place at high temperature conditions, and subsequent problems include the treatment of the molten resin to be properly removed, among other things frequently damaging the protective parts of thin electrical cables, thereby causing copper conductor parts May remain exposed. Therefore, it is necessary to cut and re-weld every single pin of the piezoelectric sheet, or then increase the area to be coated with resin, thereby creating a difficult situation. Furthermore, removal of the high temperature resin often involves damage to the fragile sheet wall, to which the ceramic part (piezoelectric core of operation of the piezoelectric sheet) forming the capacitor is attached by deposition, and thus the repaired module Are often no longer as reliable as required. Therefore, the repair is so complex and uncertain that it is often not worth repairing the module, and a module with only one failed piezoelectric element and 15 normal piezoelectric elements will be rejected. There are many cases. Finally, a warp knitting machine with one or two needle beds, for each needle bed, two separate jacquard bars (one jacquard bar carrying yarn guides for even needles and the other It should be pointed out that there is a large number of modules in the machine, using a piezoelectric module attached on the jacquard bar (which carries the thread guide for odd needles).

  The object of the present invention is to overcome the limitations of the known techniques by proposing a jacquard yarn guide bar for warp knitting textile machines which is not affected by the above-mentioned drawbacks. Another object of the present invention is to provide a jacquard yarn guide rod for a warp knitting textile machine having a simple structure that is easy to implement and / or relatively low in cost. Another object of the present invention is to enable simple, quick and inexpensive replacement of a failed piezoelectric actuator without complicated technical intervention or adjustment or without damaging the actuator that is not replaced. Another object of the present invention is to reduce the downtime and problems associated with maintenance and replacement of piezoelectric actuators, as well as the spare stock needed to ensure continuous operation of the textile machine. Another object of the present invention is to reduce the cost of management, storage and maintenance of warp knitting textile machines. Another object of the present invention is to show a jacquard yarn guide bar for warp knitting textile machines that is robust, reliable and easy to use and maintain.

  These and other objects will become more readily apparent from the following description. According to the present invention, there is provided a piezoelectric actuator for a jacquard yarn guide rod of a warp knitting textile machine according to the appended claims. Achieved.

  In one aspect, the present invention relates to a rod, wherein the housing seat and / or the hooking seat is obtained by making a cut or groove in the support. In another aspect, the present invention further relates to a rod, wherein the support is the main structural bearing of the jacquard thread guide rod.

  In another aspect, the present invention further provides a piezoelectric actuator for a jacquard yarn guide rod of a warp knitting textile machine, the support being dedicated to the piezoelectric actuator and having a single piezoelectric body attached thereto, A plurality of interface electrical contacts operably connected to the piezoelectric body, and a thread guide section and a connection section that facilitates interfacing, and the mounting body is detachably engaged in the housing seat of the jacquard rod support body. The present invention relates to piezoelectric actuators that are combined and configured and pre-positioned for individual detachable attachment of the actuator to a support. In another aspect, the present invention is further configured and pre-positioned so that the mounting body is slidably engageable in a guided manner within the housing seat of the support body between the mounting and disengaging positions. And the actuator. In another aspect, the present invention provides that the mounting body further protrudes in the plane of placement of the piezoelectric body transversely to the longitudinal extension of the piezoelectric body and / or the mounting body of the longitudinal extension of the piezoelectric body. The present invention relates to an actuator that extends longitudinally along at least a portion.

  In another aspect, the present invention further relates to an actuator, wherein the mounting body includes at least one bearing portion, and a portion of the piezoelectric body is housed on or in at least a portion of the bearing portion. In another aspect, the invention further comprises at least one insert that can be slidably engageable with the mounting body guided in the housing seat of the support, the insert being inserted into the insert. Therefore, the present invention relates to an actuator in which the thickness corresponding to the width of the housing seat configured for this purpose is thinner than the corresponding thickness of the bearing portion.

  In another aspect, the present invention further facilitates cooperating with a suitable support area of the support for the bearing portion of the mount, the mounting position of the actuator on the support and the insertion of the insert into the housing seat. The present invention relates to an actuator provided with a plurality of rest areas. In another aspect, the present invention further relates to an actuator, wherein the attachment comprises at least a first hooking portion configured to cooperate with a holding seat defined by the holding portion of the support. In another aspect, the present invention further provides the first hooking portion with a support holding portion tilted relative to the direction of the longitudinal extension of the piezoelectric body and for pushing the piezoelectric actuator toward the support body. The present invention relates to an actuator provided with a surface configured to cooperate with an inclined surface.

  In another aspect, the present invention further relates to an actuator, wherein the mounting body comprises at least a second hooking portion having a shape that is easily detachably engaged within a corresponding hooking seat of the support. In another aspect, the present invention further relates to an actuator wherein the second hooking portion has a shape that is easily hooked into a corresponding hooking seat. In another aspect, the present invention further includes a rest portion configured for the attachment body to cooperate with a blocking element on the support body to keep the second hooking portion within the corresponding hooking seat on the hooking seat. It is related with an actuator provided with.

  In another aspect, the present invention further provides that the bearing portion of the mounting body has a thickness that essentially corresponds to the sheds of the plurality of housing seats in the support body, and is therefore mounted in the plurality of housing seats. The plurality of actuators relates to an actuator having respective bearing portions adjacent to each other and basically in contact with each other. In another aspect, the present invention further provides a jacquard selection device in a warp knitting textile machine, wherein at least each of the piezoelectric actuators is detachably engaged with a mounting body and is mounted on the support body. A jacquard thread guide rod including a support provided with a plurality of housing seats configured and pre-arranged for detachable mounting, each mounted alone in one of the housing seats And a plurality of piezoelectric actuators.

  In another aspect, the present invention is a piezoelectric actuator for a jacquard yarn guide rod, wherein a rest region is obtained corresponding to a connection point between the bearing portion and the insertion portion, and the thickness of the insertion portion is set to the bearing portion. The present invention relates to a piezoelectric actuator that is defined by making it thinner. In another aspect, the invention further relates to an actuator, wherein the insert comprises an insert element or basic layered element that is inserted into the bearing body. In another aspect, the invention further relates to an actuator comprising three interface electrical contacts projecting from the longitudinal end of the attachment parallel to the longitudinal extension of the piezoelectric body. In another aspect, the present invention further relates to an actuator further comprising a thread guide provided with a through-opening for the thread and mounted on the connection.

  In another aspect, the invention further relates to a group of actuators, wherein each actuator is provided with a mounting body dedicated to a piezoelectric actuator, the mounting body being independently mountable on a corresponding housing seat of the support.

  In another aspect, the invention further provides a connection device for a piezoelectric actuator of a textile machine jacquard rod, wherein the electrical connection is detachable from a bearing body and a plurality of corresponding interface electrical contacts of the plurality of piezoelectric actuators. A plurality of interconnecting elements inserted into the bearing body, which can be connected to each other, at least one interconnecting terminal for the aforementioned interconnecting element having control means for the textile machine, and the bearing body to the jacquard thread guide rod And at least one fastening portion that is configured and pre-positioned to be detachably mounted on the support. In another aspect, the invention further relates to a connection device, wherein each of the aforementioned interconnection elements comprises a female connector connected to a corresponding connection line carrying a control signal for a piezoelectric actuator from the interconnection terminal. .

  In another aspect, the invention further relates to a connection device, wherein the fastening part comprises at least one fastening body different from the bearing body, which can be detachably mounted on the bearing body. In another aspect, the invention further relates to a connection device, wherein the interconnection terminal comprises at least one connection cable and a plurality of connection lines housed in the connection cable. In another aspect, the present invention further relates to a connection device, wherein the interconnection terminal comprises a detachable connector. In another aspect, the present invention is further configured such that the bearing body and the fastening portion can be mounted on the support and electrically adapted to a plurality of piezoelectric actuators, so that the interconnection element is an interface electrical contact. The connection device is connected and the rest of the connection device does not contact the piezoelectric actuator. In another aspect, the invention further relates to a connection device comprising a filling seat comprising a connection between the interconnection element and the connection line and at least partially filled with a sealing material.

  In another aspect, the present invention further relates to a connection device, wherein the fastening portion has at least one positioning seat that is easy to accommodate a portion of the connection cable so as to keep the connection cable in place with respect to the fastening portion. . In another aspect, the present invention further relates to a jacquard selection device in a warp knitting textile machine, comprising at least a support provided with a plurality of housing seats, Each of the plurality of housing seats is removably and individually engaged with a respective attachment body of one of the aforementioned piezoelectric actuators, thereby detachably attaching the piezoelectric actuator onto the support body. Each comprising a single jacquard thread guide rod and a single attachment to which a single piezoelectric body is to be attached, each attachment being individually within a respective seat of the aforementioned housing seat A plurality of piezoelectric actuators that are detachably engaged with each other, and a plurality of piezoelectric actuators that are detachably mounted on a support of a jacquard yarn guide rod Detachably provided connected to the at least one connecting device is a.

  In another aspect, the invention further relates to a jacquard selection device, wherein the connecting device is mounted directly on the jacquard thread guide bar.

  In another aspect, the present invention further supports the jacquard thread guide rod so as to keep the actuator in the mounted position on the jacquard thread guide bar with the connecting device in the mounted position on the jacquard thread guide bar. The present invention relates to a connection device further comprising at least one working portion that is likely to act on a plurality of actuators mounted directly on the body. In another aspect, the present invention further provides that the functional part keeps the mounting body in contact with the holding part of the jacquard thread guide rod inside the housing seat of the support of the jacquard thread guide bar. The present invention relates to a connection device that easily acts on a mounting body. In another aspect, the present invention further relates to a connection device, wherein the interconnection element further comprises a plurality of female connectors operatively inserted between the plurality of female connectors and the connection lines.

  In another aspect, the invention further relates to a connection device in which the aforementioned female connector is housed in a second body that can be operatively inserted into the bearing body. In another aspect, the present invention further acts on the plurality of actuators to keep the plurality of actuators in place relative to the jacquard thread guide rod with the connecting device in a mounting position on the jacquard thread guide rod. The connecting device further comprising at least one push element that is easy to push, the push element being configured to exert a force on the actuator that acts transversely to a direction in which the force exerted by the functional part on the actuator acts About. In another aspect, the present invention further provides a jacquard thread guide for mounting a plurality of actuators by applying elastic thrust to the plurality of actuators when the pushing element is of an elastic type and a connecting device is attached to each actuator. The present invention relates to a connecting device that is easily bent so as to be kept in place with respect to the rod 2.

  In another aspect, the present invention is further a jacquard selection device in a warp knitting textile machine, comprising at least one jacquard yarn guide bar and a plurality of piezoelectric actuators for yarn guidance, each of the piezoelectric actuators Are individually mounted in respective housing seats of the jacquard thread guide rod support. In another aspect, the invention further relates to a jacquard selection device further comprising at least one connecting device mounted on a support of a jacquard yarn guide rod and connected to a plurality of the piezoelectric actuators.

  In another aspect, the invention further relates to a warp knitting textile machine comprising at least one needle bed and at least one jacquard selection device cooperating with the needle bed to make a fabric.

  In another aspect, the present invention further provides a method for attaching a piezoelectric actuator for guiding a yarn of a jacquard bar of a warp type textile machine, wherein the plurality of piezoelectric actuators for guiding the yarn are connected to the jacquard yarn guiding bar. Detachably and individually housed in a corresponding plurality of housing seats obtained on the support and shifting the blocking element movably engaged with the thread guide rod, whereby the piezoelectric actuator is thread guided Connecting by connecting the plurality of connectors of the connecting device to the corresponding plurality of electrical contacts of the piezoelectric actuator and removably mounting the fastening part of the connecting device on the support; Removably mounting the device on a support.

  Further features and advantages of the present invention are those of several preferred but non-exclusive embodiments of jacquard selection devices in warp knitting textile machines that constitute the present invention and are disclosed in the following figures: It will become more readily apparent from the illustrative and non-limiting description.

1 is a perspective view of a jacquard selection device in a warp knitting textile machine comprising a jacquard bar, a plurality of piezoelectric actuators and a plurality of connecting devices according to the present invention. FIG. 2 is a partially exploded perspective view of the device of FIG. 1 with several piezoelectric actuators, one blocking element and one connecting device removed from the device of FIG. FIG. 2 is a side view of the apparatus of FIG. 1. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. FIG. 5 shows the holding element separated from the other parts of FIG. 4. It is sectional drawing along the VV line of FIG. FIG. 3 shows three different operating positions of the blocking element of FIG. 2 relative to the rest of the piezoelectric actuator. FIG. 4 is a view similar to the side view of FIG. 3, showing the actuator and connection device separated from the other parts of FIG. 3. FIG. 4 is a view similar to the side view of FIG. 3, showing the actuator separated from the other parts of FIG. 3. FIG. 9 is another view similar to the side view of FIG. 3, showing some hidden portions in broken lines, and FIG. 9a in FIG. 9 is an enlarged view of a portion of FIG. It is a top view of the piezoelectric element close to a plurality of housing seats. FIG. 2 is a cross-sectional view of a jacquard selection device showing one of three sequential attachment positions of a piezoelectric actuator on a jacquard bar. FIG. 2 is a cross-sectional view of a jacquard selection device showing one of three sequential attachment positions of a piezoelectric actuator on a jacquard bar. FIG. 2 is a cross-sectional view of a jacquard selection device showing one of three sequential attachment positions of a piezoelectric actuator on a jacquard bar. It is a perspective view of a piezoelectric actuator. It is a perspective view of a piezoelectric actuator. FIG. 6 is a perspective view of the blocking element as seen from the inside of the support in the mounting position. It is a perspective view of the jacquard stick | rod of FIG.

  Referring to the previous figure, a warp knitting machine (not shown since it is of a known type per se) comprises at least one device 1 for selecting jacquard according to the invention. The jacquard selection device 1 includes at least one jacquard yarn guide bar 2 for each needle bed of a textile machine, a plurality of piezoelectric actuators 3 and a plurality of connection devices 4. Each of the jacquard thread guide rods 2 is detachably engaged with a thread guide single actuator mounting body 6 and can be individually mounted on the support body 7 with the single actuator. A support 7 provided with a plurality of housing seats 5 arranged and pre-arranged is provided. The jacquard bar support 7 includes a housing seat 5 for each piezoelectric actuator 3 to be accommodated in a predetermined number of bars. The housing seat 5 extends perpendicular to the main longitudinal extension of the bar and is preferably obtained by making or crafting a cut or groove in the support 7. The support 7 is preferably the main structural bearing of the jacquard yarn guide rod.

  The bar 2 further comprises at least one mounting part 47 and is mounted on the textile machine by the mounting part 47. For reasons of simplicity, each figure shows an exemplary bar 2 having only a limited extension and one mounting 47, but as is known, the actual bar is much longer and generally has multiple Accompanying the attachment. In any case, the present description applies to rods 2 of any practical length in the same way. The support 7 can be made of, for example, aluminum or a suitable alloy. The rod support 7 is provided with a front surface 7a and a rear surface 7b extending in respective directions parallel to the main longitudinal extension of the support 7. A plurality of corresponding housing seats 5 are preferably provided on the front surface 7a and the rear surface 7b, respectively. The housing seat 5 on the front surface 7a is offset with respect to the housing seat 5 on the rear surface of the needle port so that it can lie on the even and odd needles of the needle bed of the textile machine, respectively.

  In an alternative embodiment (not shown), two jacquard thread guide bars can be provided for each needle bed, one of which is a housing seat 5 for a piezoelectric actuator 3 that operates with an even number of needles on the needle bed. The other rod carries a housing seat 5 for the piezoelectric actuator 3 that operates with odd needles in the needle bed.

  A piezoelectric actuator 3 for a jacquard yarn guide rod 2 of a warp knitting textile machine has one piezoelectric body 8, a plurality of interface electrical contacts 9 operatively connected to the piezoelectric body 8, and an interface with the yarn guide portion 11. A connecting portion 10 that is easy to be provided, and at least one attachment body 6 that is exclusively used for the piezoelectric actuator 3 and that is independently coupled to the piezoelectric body 8 are provided. Advantageously, a single piezoelectric body 8 is mounted on the mounting body 6. “Mounted on the mounting body” means that a part of the piezoelectric body 8 is inserted into the mounting body 6 and that a part of the piezoelectric body 8 is alternatively fastened to the outside of the mounting body 6. Mean both. The attachment is performed, for example, by inserting a part of the piezoelectric body 8 into the attachment body 8. In an alternative embodiment, the attachment can be done by connecting a portion of the piezoelectric body 8 on the outer surface of the attachment body 6. The piezoelectric body 8 means a complete piezoelectric sheet or piezoelectric ceramic sheet capable of performing a bending operation necessary for the operation of the single piezoelectric actuator 3. For example, the piezoelectric body 8 includes a sheet provided with two piezoelectric layers on two opposing surfaces, and can function as a capacitor that is steered to bend the sheet in each direction. Only the piezoelectric body 8 of the corresponding piezoelectric actuator 3 is mounted on the mounting body 6 of each piezoelectric actuator 3, that is, at the portion inserted into the mounting body 6, or attached to the outside of the mounting body 6, and other complete The piezoelectric body 8 (that is, the piezoelectric body 8 belonging to another piezoelectric actuator 3) is not attached on the attachment body 6 of each piezoelectric actuator 3 or attached to the outside of the attachment body 6. The thread guide 11 or the thread guide (for example made of steel chips) is provided with a through opening 12 for guiding the thread at the lower part of the actuator and is mounted on the connection 10 of the actuator. In the present disclosure, the term piezoelectric includes the term piezoelectric ceramic. The yarn guide part is both for the movement given by bending by the piezoelectric sheet (horizontal shift) and the movement generated by the jacquard bar shog movement by the jacquard bar holding the piezoelectric element (longitudinal shift to the needle bed). Designed to guide the yarn. The thread guide is movable at least between two extreme positions defined by a stopper 46 defined on the jacquard bar support 7.

  The electrical connection between the piezoelectric actuator 3 and the textile machine control / steering system (electrical control element) protrudes from the piezoelectric body 8 or piezoelectric sheet and from a mounting body 6 formed of, for example, a polymer or other plastic material. Consisting of contacts 9 or pins, the piezoelectric actuator 3 and the textile machine control / steering system (electrical control element) are integrated with the electrical contacts 9 or pins and integrated, for example by internal welding, the mounting body 6 is such Insulates, protects and secures the pin, thereby making it robust and reliable. Advantageously, the piezoelectric body 8 or the upper part of the piezoelectric sheet is embedded in the mounting body 6. Preferably, three interface electrical contacts 9 are provided which project from the longitudinal end of the mounting body 6 in parallel with the longitudinal extension of the piezoelectric body 8. The mounting body 6 can be detachably engaged in the housing seat 5 of the jacquard rod support 7 and can be individually detachably mounted on the support 7 of the piezoelectric actuator 3. Configured and pre-positioned. Therefore, the piezoelectric actuators 3 can be inserted and removed one by one, and are completely compatible. Advantageously, the mounting body 6 is guided in the respective housing seat 5 of the support 7 between the mounting position (shown in FIG. 12) and the disengagement position (shown in FIG. 11). Configured and pre-positioned to be slidably engageable in form. The housing seat 5 is constructed and pre-positioned to guide the sliding of the actuator mounting body 6 between the mounting position and the disengagement position. Furthermore, the attachment body 6 protrudes into the arrangement plane of the piezoelectric body 8 in a direction transverse to the longitudinal extension of the piezoelectric body 8.

  Advantageously, the attachment body 6 extends longitudinally along at least a part of the longitudinal extension of the piezoelectric body 8. The mounting body 6 includes at least one bearing portion 13, and a part of the piezoelectric body 8 is accommodated on the bearing portion 13, preferably in the bearing portion 13. The bearing portion 13 can be made of, for example, a plastic material. Preferably, the bearing portion 13 of the mounting body 6 has a thickness that basically corresponds to the opening of the housing seat 5 in the support body 7, and thus a plurality of mounting portions mounted in the corresponding housing seats 5. The actuator has bearings 13 which are adjacent to each other and essentially in contact with each other, and as can be seen from FIGS. 1, 2 and 4, define an essentially continuous surface on the outside. Advantageously, the mounting body 6 can be held on the end of the bar 2 by a suitable mechanical stopper (not shown since it is of a known type per se).

  The mounting body 6 further comprises at least one insert 14 which can be slidably engaged in a guided manner in the respective housing seat 5 of the support 7. The insertion portion 14 is advantageously thin, with the thickness corresponding to the width of the housing seat 5 configured so that the insertion portion 14 is inserted thinner than the corresponding thickness of the bearing portion 13. The insertion part 14 penetrates completely into the crack of the rod and determines its position without error. The bearing portion 13 of the mounting body 6 has an actuator mounted on the mounting body 7 and the insertion portion 14 is inserted into the housing seat 5 (defined on the edge of the housing seat 5). A plurality of rest areas or surfaces 15 are provided which are easy to cooperate with the corresponding support areas 16. Preferably, the rest area 15 is made at the connection point between the bearing part 13 and the insertion part 14 and is advantageously defined by making the thickness of the insertion part 14 thinner than the bearing part 13. Preferably, the insert 14 comprises an insert element or basic layered element inserted into the bearing body. Advantageously, the mounting body 6 comprises at least a first hooking part 17 configured to cooperate with a holding seat 18 defined by the holding part 19 of the support 7. Preferably, the first hooking part 17 is made on the insertion part 14. Preferably, the first hooking portion 17 has a surface 17 a that is inclined with respect to the longitudinal extension of the piezoelectric body 8 and is configured to cooperate with a corresponding inclined surface 18 a of the holding portion 19 of the support 7. Prepare.

  The support 7 of the jacquard thread guide rod 2 is close to the housing seat 5 in order to keep all the actuator mounts 6 in contact with the support 7 when the actuator is mounted on the rod 2 For example, below the housing seat 5, it is further provided with at least one holding portion 19 which is configured to define a holding seat 18 and to act on the first hooking portion 17 of the actuator mounting body 6. Preferably, the holding part 19 is arranged in the longitudinal deployment direction of the housing seat 5 so as to push the first hooking part 17 of the actuator mounting body 6 toward the support body 7 when the actuator is mounted on the rod 2. The surface 18a tilted with respect to the surface is defined. The contact between the inclined surface 17a and the inclined surface 18a is caused between the rest region or rest surface 15 of the piezoelectric actuator 3 and the corresponding support region 16 (defined on the edge of the housing seat 5) of the support 7. Ensure accurate contact and bonding without gaps. Preferably, the first hooking portion 17 is further provided with a rest surface 17b configured to be placed on the corresponding support surface 18b of the holding portion 19 of the support 7. The contact between the rest surface 17b and the support surface 18b accurately defines the vertical position of the piezoelectric actuator 3 that defines the end surface stopper for the insertion portion 14. The holding part 19 ensures a controlled forced coupling of the insertion part 14 and the bar at the same time as adjusting the position of the thread guide part. The holding part 19 accurately positions the piezoelectric actuator 3 both in the horizontal direction and in the vertical direction. This is because the holding portion 19 also functions as a lower end surface stopper when the insertion portion 14 slides within the housing seat 5. Advantageously, the holding part 19 comprises at least one holding element 20, for example made of metal, fastened to the support 7.

  Preferably, the holding part 19 is provided with a holding element 20 that can be mounted on the support 7, means 21 for mounting on the support 7, for example with mounting screws, and the position of the holding part 19 with respect to the support 7. And a fastening means 23 to the support 7 that is easy to fasten the holding element 20 in a non-detachable manner after the fine adjustment of the position of the holding element 20. . The fine adjustment element 22 may be configured by an adjustment pin that is inserted into the hole of the holding portion 19 and that can easily change the position of the holding seat 18 with respect to the support 7 by operation of the holding element 20 during operation. Specifically, the adjustment is performed by attaching the holding element 20 on the support 7 by the attaching means 21 without completely fastening the holding element 20 (for example, without completely fastening the attaching means 21), Only a few sample piezoelectric actuators 3 are inserted along the bar and the fine adjustment element 22 is used (using the elasticity and deformation of the material from which the holding element 20 is made) to optimize the mounting of the actuator By adjusting the position of the holding seat 18 so that the attachment means 21 is then fully tightened and the holding element 20 is fastened in a non-removable manner by the fastening means 23. The fastening means 23 to the main body can be constituted by welding or other elements or devices that make it easy to fasten the holding element 20 on the support 7 in a preferably non-detachable manner after adjusting the position of the holding element 20.

  Advantageously, the mounting body 6 further has at least a second hooking part 24 having a shape that can easily be removably engaged in a corresponding hooking seat 25 obtained in the housing seat 5 of the support body 7. Is provided. Preferably, the second hooking portion 24 has a shape that is easily hooked into the corresponding hooking seat 25. The mounting body 6 comprises on the hooking seat 25 a rest portion 26 configured to cooperate with a blocking element 27 of the support 7 to keep the second hooking portion 24 in the corresponding hooking seat. Preferably, the support body 7 further includes the hooking seat 25 configured to receive the second hooking portion 24 of the mounting body 6 on each housing seat 5, for example. Preferably, the hooking seat 25 is obtained using a groove of the support 7.

  Advantageously, the bar further comprises the blocking element 27 (shown in detail in FIG. 15) movable at least between a first operating position and a second operating position, the first operating position Then, the blocking element 27 tends to act on the rest portion 26 of the mounting body 6 in order to keep the second hooking portion 24 in the hooking seat 25 and keep the actuator mounted on the rod, and the second operation In position, the blocking element 27 is unlikely to act on the rest portion 26 and allows the second hooking portion 24 to be removed from the hooking seat 25 and the actuator to be removed from the bar. The blocking element 27 is detachably mounted on the support 7 so as to move at least between the first operating position and the second operating position. Preferably, the blocking element 27 is slidably mounted in a sliding seat 28 obtained in the support 7 so as to shift at least between a first operating position and a second operating position. The blocking element 27 includes a plurality of holding projections 29 that are likely to act on the actuator rest portion 26, and a plurality of recesses 30 that are alternated with respect to the holding projection 29 to keep the rest portion 26 free to move, Is provided. The recess 30 is advantageously suitable for simplifying the movement of the blocking element 27 and the precise positioning at the mounting position of the actuator in the region of the first contact with the rest 26 of the piezoelectric actuator 3. A first guide or chamfer or connection 31 or other similar element is provided. Preferably, each rest 26 is provided with a corresponding second guide or chamfer or connection 48 or other similar element, whose functions are the movement of the blocking element 27, the rest of the rest 26, Therefore, the accurate positioning of the piezoelectric actuator 3 is simplified.

  As can be seen from FIG. 15, the first guide 31 is advantageously provided on at least the side walls 29 a and 29 b and the rear wall 29 c of the holding projection 29 (the rear wall means a wall facing the support body 7). It is not necessary to provide on the outer wall of the holding projection 29 (the outer wall means a wall facing the piezoelectric actuator 3). As can be seen from FIG. 13, the second guide 48 is advantageously at least on the contact walls 26a and 26b of the rest 26, and thus on the vertical and horizontal contact walls 26a and 26b in the disclosed embodiment. Provided. As shown in detail in FIG. 9a, the contact between the side walls 29a and 29b and the contact wall 26b, which is simplified by the corresponding first guide 31 and second guide 48, supports the rest surface 17b. The surfaces 18b are pressed against and accurately define the vertical position of the piezoelectric actuator 3 on the bearing surface 18b to ensure blocking and accurate vertical positioning of the piezoelectric actuator 3.

  Again, as shown in FIG. 9a, the contact between the rear wall 29c and the vertical contact wall 26a, simplified by the corresponding first guide 31 and second guide 48, causes the rest region 15 to While pressing against the support area 16, it ensures an accurate and gap-free connection between such elements to ensure the blocking and accurate horizontal positioning of the piezoelectric actuator 3. Therefore, the blocking of each piezoelectric actuator is performed safely and accurately. Preferably, the blocking element 27 has at least three operating positions (Figs. 6, 6a and 6b), i.e. a first operating position (Fig. 6) and a second operating position (Fig. 6 (a)) and a third operating position (FIG. 6 (b)), in which the blocking element 27 moves all the second hooking parts to their position. To act on all rests 26 of all actuators mounted on the support 7 so as to keep them in their respective hooking seats, in the second operating position the blocking element 27 is on the support 7 The rest part of the second part group of the actuator of the second part group attached on the support body 7 is likely to act on the rest part 26 of the first part group of the actuator of the attached first part group. 26, and therefore the corresponding second It allows the hooking part to be removed from the corresponding hooking seat and the second group of actuators to be removed from the support 7, and in the third operating position, the blocking element 27 is on the support 7. The rest portion of the first partial group of the actuator of the first partial group attached on the support body 7 is likely to act on the rest portion 26 of the second partial group of the actuator of the attached second partial group. 26 so that the corresponding second hooking part can be removed from the corresponding hooking seat and the first subgroup of actuators can be removed from the support 7.

  In this case, the blocking element 27 slides in a sliding seat 28 obtained in the support 7 so as to shift at least between the first operating position, the second operating position and the third operating position. Mounted in a moving manner. Preferably, the rest portions 26 of the first subgroup and the rest portions 26 of the second subgroup include all the rest portions 26 mounted in the bar and are arranged alternately, the first subgroup being The even-numbered rest portions 26 are included, and the second subgroup includes the odd-numbered rest portions 26. Basically, the blocking element 27 can include a latch that slides within the sliding seat 28 of the support 7, which includes a rest portion of the actuator to keep the actuator mounted correctly on the rod. A holding projection 29, such as a tooth, is provided which is likely to act on 26.

  In the first operating position (FIG. 6), the blocking element 27 blocks all the actuators in the mounting position, for example a second operating position in which the halves of the housing seat 5 are displaced from the first operating position. In FIG. 6 (a), only the even number of actuators (on the holding projection 29) are blocked, and the odd number of actuators (on the recess 30) are freely inserted and removed. In the third operating position (FIG. 6 (b)) in which the other half of the mouth is shifted from the first operating position, only odd-numbered actuators are blocked and even-numbered actuators can be freely inserted or removed. Let Thus, while inserting the piezoelectric actuator 3 onto the jacquard bar, all even actuators should be inserted and then all odd actuators should be inserted (and vice versa), in which case the blocking element 27 is Shifted to the first blocking position of all actuators. In any case, the blocking element 27 can be shifted in the sliding seat 28 either manually or by an automatic actuating mechanism (not shown in detail as it may be of any suitable known type). The blocking element 27 and hooking seat 25 can be of any shape depending on various needs. Furthermore, a connection device 4 for a piezoelectric actuator 3 of a jacquard rod of a textile machine, comprising at least one of a bearing body 32 and a control means (not shown because it is of a known type) of the textile machine A plurality of interconnection elements 33 inserted into the bearing body 32, which can be electrically connected in a detachable manner to the plurality of interface electrical contacts 9 corresponding to the plurality of piezoelectric actuators 3; There is provided a connecting device 4 comprising at least one fastening part 35 constructed and pre-positioned to detachably attach 32 to the support 7 of the jacquard thread guide rod 2.

  Advantageously, the connection device 4 is configured such that it can be mounted directly on the jacquard thread guide rod 2. The connection device 4 can be mounted on a plurality of actuators, preferably a plurality of connection devices 4 are provided, each of which can be mounted on a plurality of actuators, for example each of the 16 actuators. Advantageously, the fastening part 35 can be an integral part of the bearing body 32 or can be different from the bearing body 32, which can be detachably mounted on the support body 7 using, for example, a first screw 36. A fastening body can be further provided. Further, the fastening body can be detachably mounted on the bearing body 32 using, for example, another screw, and / or fastened to the bearing body 32 with resin or other suitable means such as a tongue piece. You can also. The bearing body 32 can be fastened to the support body 7 using the second screw 37. When the attachment body 6 and the fastening body are fastened to each other in a non-detachable manner, the fastening portion 35 can further include an auxiliary attachment body 42 to which the bearing body 32 and the fastening body are fastened. Can be detachably mounted on the support 7 using, for example, a third screw 43, and is disposed between the support 7, the bearing body, and the fastening body.

  Accordingly, the connecting device 4 can be easily removed from the support body 7 by removing the auxiliary attachment body 42 from the support body 7 while keeping the bearing body 32, the fastening body and the auxiliary attachment body 42 in a mutually connected state. Is possible. The interconnection terminal 33 includes at least one connection cable 38 and a plurality of connection lines 39 accommodated in the connection cable 38. The interconnection terminal 33 can further include a detachable connector 40 for detachably connecting to the control means of the textile machine. The upper part of the cable can carry, for example, a male socket that easily matches the female socket of the connection to the interface board. Advantageously, the fastening body has at least one positioning opening or seat 41, which is easy to accommodate a part of the connection cable 38, to keep the connection cable 38 in position relative to the fastening body. Advantageously, the bearing body 32 and the fastening part 35 are adapted to be mounted on the support 7 and to be electrically coupled to a plurality of piezoelectric actuators 3, so that the interconnection element 34 is connected to the interface electrical contact 9. The remaining portion of the connecting device 4 does not contact the piezoelectric actuator 3, that is, the attachment body 6 and the other portion (for example, as can be seen from FIGS. 5 and 9). Preferably, no other part of the connecting device 4 is in physical contact with the piezoelectric actuator 3 and / or advantageously the connecting device 4 substantially holds the holding mechanical interaction with the piezoelectric actuator 3. I don't have it.

  In a variant not shown in the attached figures, the connection device 4 is arranged to keep the actuator in the mounting position on the rod 2 with the connection device 4 in the mounting position on the jacquard thread guide rod 2. A functional part that can easily act on a plurality of actuators directly mounted on the support 7 of the rod 2 can be further provided. In this case, the functional part is defined by the lower surface of the bearing body 32 that comes into contact with the mounting body 6 of the piezoelectric actuator 3 at the mounting position, thereby pushing the mounting body 6 downward and keeping the mounting position on the rod 2. be able to. The functional portion is attached to the actuator attachment body 6 so as to keep the attachment body 6 in contact with the holding portion 19 of the jacquard thread guide rod 2 inside the housing seat 5 of the support body 7 of the jacquard thread guide rod 2. Easy to act. Again referring to the preferred embodiment, advantageously, each of the interconnection elements 34 comprises a female connector that can be removably connected to the male interface electrical contact 9, for the actuator to the interconnection terminal 33. It is connected to the corresponding connection line 39 carrying the control signal (for example using the connection terminal of the connection line 39 inserted in the female interconnection element 34) and thus to the control board using a connection to the interface board. Preferably, the female connector is housed in a second body 44 that is operatively inserted into the bearing body 32. The female connector is made of, for example, copper, and is preferably embedded in the second body 44 and is permanently fastened to the second body 44 using an adhesive, a sealant, an epoxy resin, or the like. Advantageously, the connection device 4 further comprises a filling seat which includes a connection between the interconnection element 34 and the connecting line 39 and which is easy to be at least partially filled with a sealing material, for example a resin, The positioning seat 41 may be the same as that defined between the bearing body 32 and the fastening portion 35 or inside the fastening portion 35. In order to avoid various problems related to the electrical connection between the female connector and the connection line 39, the resin is poured, for example, from an enlarged hole for passing the cable. The resin fills the entire underlying area including the connecting line 39 and the female connector and thus forms a block with the bearing body 32. The entire area is insulated and protected from penetrating moisture and the like, but in particular, the poured resin prevents the connecting wire 39 and female connector from moving or vibrating.

  In another variant, not shown, the device keeps the actuators in place relative to the jacquard thread guide bar 2 with the connecting device 4 in the mounting position on the jacquard thread guide bar 2. It may include at least one push element 45 that is susceptible to a plurality of actuators. When the device includes the functional part, the pushing element is configured to exert a force acting on the actuator in a direction transverse to the direction in which the force exerted by the functional part on the actuator acts, preferably in the vertical direction. Is done. The pushing element is of an elastic type, and when the connecting device 4 is attached to each actuator, it exerts elastic thrust on the plurality of actuators so as to keep the actuators in place with respect to the jacquard yarn guide rod 2 at the mounting position. Easy to bend.

  In all the above cases, when the connecting device 4 is removed from the support 7 and the connecting device 4 is separated from the electrical contact 9 of the actuator, it is removed after actuating the blocking element 27 and shifting it to the appropriate position. The piezoelectric actuator 3 (either an even or odd actuator depending on the position of the blocking element 27) connected to the connecting device 4 is automatically released and removed, thus removing the failed actuator and functioning new. It can be replaced with an actuator. The blocking element 27 is then shifted again to the blocking position for all the piezoelectric actuators 3 and the removed connection device 4 is reattached to reconnect it to the electrical contacts 9 or pins of the actuator. 4 is fastened to the jacquard bar again and the system is reset.

  Furthermore, a method for attaching the piezoelectric actuator 3 for the jacquard yarn guide rod 2 of the warp knitting machine will be described. This method includes at least a plurality of piezoelectric actuators 3 on the support 7 of the jacquard yarn guide rod 2. A step of detachably and individually accommodating in a plurality of corresponding housing seats 5 obtained and shifting the blocking element 27 movably engaged with the thread guide rod 2, thereby shifting the piezoelectric actuator 3 into the thread Maintaining the mounting position on the guide rod 2, coupling the plurality of connectors of the connection device 4 to the corresponding plurality of electrical contacts 9 of the piezoelectric actuator 3, and fastening portions 35 of the connection device 4 on the support 7. Attaching the connecting device 4 to the support 7 in a detachable manner.

  The invention thus created can be subject to several modifications and variations, all within the scope of the inventive idea. In practice, any material or size can be used according to various needs. Moreover, all details can be replaced by other technically equivalent elements.

  The present invention achieves significant advantages. First, the present invention is simple in structure, easy to implement and not very expensive. The present invention allows a single piezoelectric actuator to be easily and quickly and inexpensively replaced without complicated technical intervention or adjustment and without damaging an unreplaced actuator. The present invention further reduces the downtime and problems associated with maintenance and replacement of piezoelectric actuators, as well as the spare storage necessary to ensure continuous operation of the textile machine. This is because it is no longer necessary to stock a module with all 16 actuators, but only a few individual actuators need to be stocked. Therefore, the management and maintenance costs of the machine according to the present invention are significantly lower than the prior art. Furthermore, the attachment of the piezoelectric actuator is robust and reliable, ensuring accurate and continuous operation of the jacquard selection device. In addition, there may be only one jacquard bar, no longer two as in the previous version equipped with the module, and it is compact, lightweight and robust. This is because a jacquard bar can accommodate both piezoelectric actuators designed to act on even needles and piezoelectric actuators designed to act on opposite odd needles. In addition, the traditional jacquard bars (remember that one is for even needles and the other is for odd needles) share the same shog motion generated by the two twin cams, The jacquard bar according to the invention completely eliminates the possibility of errors during movement (displacement between the two bars) since it is shifted by one cam and / or motor. Having only one cam or one motor, rather than two, along with its control (e.g. light) and actuation (drive) elements can reduce costs and simplify the mechanical structure. The fact that the vertical breaks that easily accommodate the actuators on both sides of the bar are mechanically cut provides such bars with very high accuracy and practically eliminates the expected leveling of the single actuator position. Since each split contains one actuator, the actuator has one position with no horizontal or vertical adjustment. Thus, the actuator will perform all interventions, including fitting the module, aligning and aligning the needle, and adjusting, characteristic of the prior art, both when mounting and replacing the actuator on the rod. Without it, even non-professionals can exchange without mistake.

DESCRIPTION OF SYMBOLS 1 Jacquard selection apparatus 2 Jacquard thread guide rod 3 Piezoelectric actuator 4 Connection apparatus 5 Housing seat 6 Attachment body 7 Support body 8 Piezoelectric body 9 Interface electrical contact 10 Connection part 11 Thread guide part 12 Through-opening 13 Bearing part 14 Insertion part 15 Rest surface 16 Support area 17 Hooking portion 18 Holding seat 19 Holding portion 20 Holding element 22 Fine adjustment element 23 Fastening means 24 Hooking portion 25 Hooking seat 26 Rest portion 27 Blocking element 28 Sliding seat 29 Holding projection 30 Recess 31 Connection portion 32 Bearing body 33 Interconnection terminal 34 Interconnection element 35 Fastening part 38 Connection cable 39 Connection line 40 Connector 41 Positioning seat 42 Auxiliary attachment body 44 Main body 45 Push element 46 Stopper 47 Attachment part 48 Connection part 50 Module

Claims (15)

A jacquard yarn guide rod (2) for a warp knitting machine, each of which is detachably engaged with an attachment body (6) of a single piezoelectric actuator (3), and the unit on the support body (7). includes one piezoelectric actuator (3) of said consists in order to carry out individual removable mounting a plurality of housing seats (5) are provided support (7),
In order to keep the attachment body (6) of the plurality of piezoelectric actuators (3) in contact with the support body (7) when the piezoelectric actuator (3) is attached onto the yarn guide rod (2). At least one holding part (19) configured to define a holding seat (18) near the housing seat (5) and to act on the first hooking part (17) of the mounting body (6); )
Jacquard thread guide rod. It said housing seats (5), said mounting body (6) is configured to slide between a mounting position and a disengaged position of the guide, jacquard thread-guide bar according to claim 1.   The jacquard thread guide bar according to claim 1 or 2, wherein the housing seat (5) extends perpendicular to the main longitudinal extension of the bar (2).   The support (7) is provided with a front surface (7a) and a rear surface (7b) extending in respective directions parallel to the main longitudinal extension of the support (7), and the front surface (7a) and the rear surface ( 7b) are provided with a plurality of corresponding housing seats (5), the needles so that the housing seats (5) of the front surface (7a) lie on the even and odd needles of the needle bed, respectively. The jacquard thread guide bar according to any one of claims 1 to 3, wherein the jacquard thread guide bar is displaced with respect to the housing seat (5) on the rear surface of the shed. The holding part (19) pushes the first hooking part (17) of the attachment body (6) toward the support body (7) with respect to the longitudinal deployment direction of the housing seat (5). The jacquard thread guide rod according to any one of claims 1 to 4 , which defines an inclined surface (18a). The jacquard yarn guide rod according to any one of claims 1 to 5 , further comprising a holding element (20) mounted on the support (7) and defining the holding portion (19). Means (21) for attaching the holding element (20) to the support (7); and a fine adjustment element (22) for adjusting the position of the holding part (19) relative to the support (7). The support body (20) is finely adjusted by the fine adjustment element (22) and then the holding element (20) is fastened to the support body (7) in a non-detachable manner. The jacquard thread guide rod according to claim 6 , further comprising a fixing means (23) for fixing to 7). Said support (7) further comprises the mounting body (6) the second hooking portion (24) configured to accommodate a hooking seat (25), any one of claim 1 to 7 Jacquard thread guide rod as described in 1. And further comprising a blocking element (27) that can be shifted between at least a first operating position and a second operating position, wherein in the first operating position the blocking element (27) is the second hooking part. Acts on the rest (26) of the mounting body (6) to keep (24) in the hooking seat (25) and keep the piezoelectric actuator (3) mounted on the rod (2). In the second operating position, the blocking element (27) is unlikely to act on the rest portion (26), and the second hooking portion (24) is removed from the hooking seat (25). And a jacquard thread guide bar according to claim 8 , which enables the piezoelectric actuator (3) to be detached from the bar (2). The blocking element (27) includes a plurality of holding projections (29) acting on the rest portion (26) and a plurality of recesses (30) arranged alternately with the holding projections (29). 10. A jacquard thread guide bar according to claim 9 , wherein said rest part (26) is freely movable. The blocking element (27) is shiftable between at least three operating positions, i.e. a first operating position, a second operating position and a third operating position, wherein in the first operating position the The blocking elements (27) are all of all the piezoelectric actuators (3) mounted on the support (7) to keep all the second hooking parts (24) in their hooking seats (25). In the second operating position, the blocking element (27) acts on the rest of the first subgroup of piezoelectric actuators (3) mounted on the support (7). Acting on the rest part (26) of the first subgroup, but on the rest part (26) of the second subgroup of the piezoelectric actuator (3) of the second subgroup attached on the support (7). Hard to act and therefore before responding Allowing the second hooking parts to be removed from their hooking seats and the second subgroup of actuators to be removed from the support (7), in the third operating position the blocking The element (27) acts on the rest part (26) of the second subgroup of the actuator of the second subgroup mounted on the support (7), but on the support (7). The first part group actuators attached to the first part group are less likely to act on the rest part (26) of the first part group, so that the corresponding second hooking part is removed from their hooking seats And a jacquard thread guide rod according to claim 9 or 10 , which enables said first group of actuators to be detached from said support (7). The rest portions (26) of the first subgroup and the second subgroup include all rest portions (26) mounted on the rod, and the first subgroup is an even rest portion (26). The jacquard thread guide rod of claim 11 , wherein the second subgroup includes an odd rest portion (26). 13. Jacquard thread guide according to any one of claims 9 to 12 , wherein the blocking element (27) is shiftably mounted on the support (7) so as to shift between the operating positions. rod. Said blocking element (27) is slidably attached to said support (7) sliding seat obtained in (28) in order to switch the operating position, one of the claims 9-13 A jacquard thread guide rod according to claim 1. A jacquard selection device (1) in a warp knitting machine, at least,
A jacquard thread guide rod (2) according to any one of claims 1 to 14 ,
Each has a mounting body (6) that is dedicated to the piezoelectric actuator (3) and to which a single piezoelectric body (8) is to be mounted, and each mounting body (6) is provided on the housing seat (5). A plurality of piezoelectric actuators (3) individually detachably engaged in corresponding seats.

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